Door-lifting means



March 1930- A. WASBERG El Al.

DOOR LIFTING MEANS Filed Sept. 24, 1928 2 Sheets-Sheet 1 [N VE/VTOPS 9x51 01/955525 K NNETH J 705w QTTYs Patented Mar. 18, 1930 UNITED STATES PATENT OFFICE AXEL WASBERG AND KENNETH J. TOBIN, OF CHICAGO, ILLINOIS, ASSIGNORS TO CAMEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS noon-Lnr'rme MEANS Application filed September 24, 1928. Serial No. 308,120,

This invention relates to a door lifting means and concerns itself witha structure in which the door normally rests upon a track against sliding movement, and in which the door may be'elevated for supporting the same upon rolling elements for slidin movement. The invention concerns itself prlmarily with the lifting means for elevating the door and temporarily supporting the same upon its rollin means in order that the door may be opene or closed.

The invention comprises a novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the ap ended claims.

In the drawings w ich illustrate a preferred embodiment of this invention and in which similar reference numerals refer to similar features in the difierent views.

Figure 1 is a fragmentary side elevational view of a house car embodying the door involving this invention and showing the door in. its normally lowered position in frictional engagement with its supportin track.

Figure 2 is a view similar to i ure 3, illustrating the door in its elevated position and supported upon its rolling elements for sliding movements.

Fi re 3 is a fragmentary enlarged sectiona view taken upon the line IIIIII of Figure 1.

Fi ure 4 is an enlarged fragmentary sectiona view taken upon the line IV.-IV of Figure 1, looking in the direction of the arrows.

Figure 5 is an enlarged fragmentary sectional view taken upon the line VV of Figure 1, looking in the direction of the arrows.

Figure 6 is an enlarged fragmentary sectional view taken upon the line VI-VI of Figure 1, looking in the direction of the arrows.

Figure 7 is an enlarged detail sectional view taken upon the line VIIVII of Figure 2, looking in the direction of the arrows.

Figure 8 is an enlarged fragmentary elevational view of the operating lever and the coacting parts adjacent thereto.

In the drawings there is shown a portion of the side of a house car having a doorway with the doorway closed by a sliding door 1 adapted to be supported upon a track adjacent one margin of the doorway. The door 1 is provided with means for frictionally supporting the same upon the track 2 ainst sliding movement. In the exemplification of this invention this supporting means is shown in the form of an angle bar 3 which is secured adjacent one margin of the door. The door is also provided with rolling means 4 for supporting the same upon the track 2 when it is desired to slide the door for opening or closing the same. The rolling elements 4 are journalled. upon short axles 5, the outer ends of which are supported in housing members 6 attached to an angle member 7 extending parallel with the door. The inner ends of the axles 5 which may be of polygonal form extend through apertures in the angle member 7 at its ends and freely confined in pockets 8' of guide member 8 secured.

to the door.

It will be noted that horizontal flange 7 has been cut away adjacent the rollers 4 and adjacent the ends thereof and, that the ver tical flange 7 is slidably' confined in thepocket 8 of the guide members 8, as shown in Figure 3. These guide members have at taching flanges 8 which are secured to the door and these flanges 8 are spaced from the body portion of the members to provide the pockets 8. It will be noted that the vertical flange 7" of the angle member 7 is confined at its ends in these pockets, but that there is a sufiicient space between the lower end of said vertical flange and the supporting flange of the angle bar 3 to allow for relative movement between the door and said vertical flange 7".

Between the two roller housings 6 there is secured a pair of U-shaped metal members 9. The upper legs of these U-shaped members are provided with flan cs 10 which are attached to the door and the ower legs thereof are provided with flanges 11 which lie adjacent the vertical flange 7" of the angle member 7, but are unattached thereto to allow for relative movement. The intermediate portions of the members ,9 provide a housing into which the horizontal flange 7 of the angle member 7 extends. In this housing above the horizontal flan e 7 a there extends a hollow rod 12. At su stantially the central portion of this hollow rod 12, there is secured a cam 13 (Figure 6), which is adapted to be operated by the lower end of a lever 14 which is pivoted to a channel member 15 secured to the door. A. keeper 16, preferably integral with the channel member spans the outer-surface of the lever 14; the lever being pivoted between the channel member 15 and the keeper 16 as shown in Figure 7. The lower end of the lever is provided with laterally projecting cams 14 which are adapted to be brought into engagement with cam 13 when the lever is swung to one side or the other as shown in Figure 2.

Spaced a suitable distance from the central cam member 13 are cams 17 which are also secured to the rod 12. In the present instance, the cams 17 are shownas riveted to the rod 12 by means of rivets 18, as shown in Figure 5. The cams 17 are substantially of an elliptical form having a major axis and a minor axis. The major axis terminates in cam surfaces 17* which are adapted for cooperation with the horizontal flange 7 a of the angle member 7 and the upper legs of the U-shaped housing 9, with the result that when the hollow rod 12 is rotated by the coaction of the cam 13 and the lever 14, the cam members 17 are likewise rotated between the horizontal flange 7 a and the upper legs of the housings 9, with the result that the door will be elevated whereby its supporting means 3 will no longer be resting upon the track 2, but on the other hand, will be supported upon the rollers 4. Of course, as soon as the lever 14 is released the door will automatically drop by gravity until it is again su ported by the angle bar 3.

rom the foregoing, it will be apparent that a very simple and efiicient structure has been provided whereby a sliding door may be quickly elevated for rolling movement and, whereby, the door will automatically descend by gravity for frictional engagement with its track as soon as theoperator releases the lever 14.

We are aware that many changes may be made and numerous details of construction maybe varied through a wide range without departing from the principles of this invention, and we. therefore, do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

We claim as our invention:

1. The combination with a track, of a slidingdoor having a support for frictionally engaging said track, a pair of ide members on the door, an element sli ably confined with respect to said guide members, rollers carried by said-element," said element having a horizontal flange, spaced housings upon said door enclosing said flange, a shaft extending through said housings above said flange, a pair of double acting cams upon said shaft, a third cam positioned between said double acting cams, and a lever for actuating said third mentioned cam.

2. The combination with a track, of a door having a support for normally engaging said track for maintaining said door against sliding movements, a pair of rolling elements upon said door, means for supporting said rolling elements for relative vertical movement with respect to the door, said means em bodying a horizontal flange, a member on said door extending outwardly above said horizontal flange, and operating mechanism between said flange and member for elevating the door.

3. In a house car having a door opening with a track adjacent or a margin of the opening, a sliding door having a support for frictionally engaging said track, a member extending lengthwise of the door and having vertical slidable engagement therewith, rollers carried by said member, said member embodying a horizontal flange, a pair of housings attached to said door and enclosing said horizontal flange, and operating means in said housing for elevating the door above said track.

4. In a house car having a door opening with a track adjacent one margin of sai opening, a door having a support for fric- "tionally engaging said track, a roller support attached to said'door for relative sliding movement in a vertical direction, rollers secured on said support, said roller support embodying a horizontal flange, housing means enclosing said flange, a shaft extendm lengthwise of the door above said horizonta flange, cams secured on said shaft for coaction between said housing means and flange, and means on said door for rotating said shaft.

5. In a house car having a doorway with a track adjacent one margin of the doorway, a door having a support for frictionally engaging said track, a roller su port extending in parallel relation to saiddbor, means for confining said roller support for relative vertical movement with respect to said door, rollers carried by said support, said roller support embodying a horizontal flange, a member on said door above'said horizontal flange, and rotatable means between said flange and member for elevating the door.

6. In'a house car having a door openin with a track adjacent one margin of sai opening, a door for closing said opening, said door having means for frictionally engaging said track against sliding movements, a roller support extending-in arallel relation with said door, means for slidabl confining said roller support, a pair of r0 lers carried by said sup ort, said support embodyin a hon-- zontal ange, spaced 'housing me ers atiis . saw

member A Wimzl at 011% margin 05 iimrvmy, 0r filming said dscrway said 35 a wpport for fris biumafiy an said track, a pair of guide members on said (212 013 said guide members having V91? tical poske' hs & r0119? uppm; having ends slidably Engaging said pmzkeits walkers (am-Tied by said aupp01t said support emhndyi mg 20 horimnmi flange, a pz mir 0f spaced housing members attached 10 Smii door andl emhracmg said flangxq a shah extending hrou h said. Musing mam" MS abwe smidhorizanta ffimge dml'ble acting cams secured in said shaft 01 05 coaction with said horimntal flange and the up zrer Wall of said heusing members, am cam to said hetween said hnusin members, and lava? piveted t0 said 6100:? an 31min parts 23mopemising said East mew 30 time; mm 1501' rotating said shafibimr m,

purpose set ."Enrthn In bestimmy Wherwf, We have hereunta subscribed our m, I 25 at @hicagag Gm @ounty Illimis.

AXEL KEN J TQBKNB 

